ABSOLUTE MAXIMUM RATINGS
BIPOLAR, C-MOS, GaAs, OPTOELECTRONIC DEVICE
1. Definition of Absolute Maximum Rating
NJRC defines maximum ratings as the values of voltage, current, temperature, power dissipation etc., which should not be
exceeded at any time, otherwise deterioration or destruction of the IC may take place. Maximum values and limits published
should be taken into consideration at all times when using or " designing in " NJRC IC's.
1.1 Maximum Voltage Ratings
Specify the maximum limitation of supply and input voltages. Maximum values and limits published should be taken into
consideration at all times when using or " designing in " NJRC IC's.
1.2 Maximum Current Ratings
Specify the maximum limitation of input and output current. Maximum values and limits published should be taken into
consideration at all times when using or " designing in " NJRC IC's.
1.3 Maximum Temperature Ratings
Specify the maximum limitation of operating and storage temperature. Maximum values and published should be taken
into consideration at all times when using or " designing in " NJRC IC's. The operating temperature range is the ambient
temperature range that IC operates just normally.
The electrical characteristics of the ICs specified at 25°C are not guaranteed to apply at the extremes of the operating
temperature range.
1.4 Maximum Power Dissipation Rating
Specify the maximum limitation of power dissipation. Maximum values and published should be taken into consideration
at all times when using or " designing in " NJRC IC's.
The power dissipation is mentioned following formula.
PD = (Tj - Ta) / θja
Where
PD
Tj
Ta
θja
:
:
:
:
Power Dissipation
Junction Temperature
Ambient Temperature
Thermal Resistance
(W)
(°C)
(°C)
(°C/W)
As Tj is normally constant, the maximum power dissipation at a particular ambient temperature is determined by the
thermal resistance of the package, which is in turn determined by it's dimensions and materials used in it's manufacture.
As a rule the smaller the package, the lower it's maximum power dissipation.
Note: Exceeding any of the maximum ratings, even briefly lead to deterioration in IC performance or even destruction.
Ver.2007-03-05
-1-
ABSOLUTE MAXIMUM RATINGS
STEPPER MOTOR CONTROLLER/DRIVER
1. Definition of Absolute Maximum Rating
NJRC defines maximum ratings as the values of voltage, current, temperature, power dissipation etc., which should not be
exceeded at any time, otherwise deterioration or destruction of the IC may take place. Maximum values and limits published
should be taken into consideration at all times when using or " designing in " NJRC IC's.
1.1 Maximum Voltage Ratings
Specify the maximum limitation of supply and input voltages. Maximum values and limits published should be taken into
consideration at all times when using or " designing in " NJRC IC's.
1.2 Maximum Current Ratings
Specify the maximum limitation of input and output current. Maximum values and limits published should be taken into
consideration at all times when using or " designing in " NJRC IC's.
1.3 Maximum Temperature Ratings
Specify the maximum limitation of operating and storage temperature. Maximum values and published should be taken
into consideration at all times when using or " designing in " NJRC IC's. The operating temperature range is the ambient
temperature range that IC operates just normally.
The electrical characteristics of the ICs specified at 25°C are not guaranteed to apply at the extremes of the operating
temperature range.
1.4 Maximum Power Dissipation Rating
Specify the maximum limitation of power dissipation. Maximum values and published should be taken into consideration
at all times when using or " designing in " NJRC IC's.
The power dissipation is mentioned following formula.
PD = (Tj - Ta) / θja
Where
PD
Tj
Ta
θja
:
:
:
:
Power Dissipation
Junction Temperature
Ambient Temperature
Thermal Resistance
(W)
(°C)
(°C)
(°C/ W)
As Tj is normally constant, the maximum power dissipation at a particular ambient temperature is determined by the
thermal resistance of the package, which is in turn determined by it's dimensions and materials used in it's manufacture.
As a rule the smaller the package, the lower it's maximum power dissipation.
Note: Exceeding any of the maximum ratings, even briefly lead to deterioration in IC performance or even destruction.
-2-
Ver.2007-03-05